WO2019230519A1 - Emitter and drip irrigation tube - Google Patents

Abstract

This emitter has an emitter body and a pedestal. The emitter body includes: a water intake part for introducing irrigation liquid; a pressure reducing flow passage groove which is for forming a pressure reducing flow passage which communicates with the water intake part and allows the irrigation liquid to flow out while reducing the pressure of the irrigation liquid; an accommodation part which communicates with the pressure reducing flow passage groove and into which the irrigation liquid flows while the pedestal is accommodated therein; and a flexible diaphragm part which approaches the pedestal upon receiving the pressure of the irrigation liquid inside a tube while the pedestal is accommodated in the accommodation part. The pedestal has through-holes for discharging the irrigation liquid that flowed into the accommodation part. The emitter body and the pedestal are connected through a hinge part.

Description

Emitter and drip irrigation tubes

The present invention relates to an emitter and a drip irrigation tube having the emitter.

For some time, drip irrigation has been known as one of the plant cultivation methods. The drip irrigation method is a method in which a drip irrigation tube is placed on the soil in which plants are planted, and irrigation liquid such as water or liquid fertilizer is dropped from the drip irrigation tube to the soil. In recent years, drip irrigation has attracted particular attention because it can minimize the consumption of irrigation liquid.

The drip irrigation tube includes a tube having a plurality of through-holes through which irrigation liquid is discharged, and a plurality of emitters (“ (Also referred to as, for example, Patent Document 1).

Patent Document 1 describes an emitter including a main body and a flap that is movable with respect to the main body around a hinge. This flap is formed of the same material as the main body, preferably the same. The flap has a membrane (diaphragm) disposed in the frame. In the operational state in which the emitter is assembled, the recess in the body is covered by a flap membrane rotated about the hinge. The recess is formed in the main body with a rim provided in the frame housing as a peripheral edge. A pressure regulating chamber is formed by pressing the flap membrane against the rim. The flow rate of the liquid flowing out from the pressure adjustment chamber is adjusted by elastically bending the membrane due to pressure fluctuation.

International Publication No. 2017/093882

In the emitter described in Patent Document 1, the flap and the main body are integrally formed with the flap opened. And the recessed part formed in the main body is covered with the film | membrane of a flap, and the pressure adjustment chamber which adjusts the flow volume of the liquid discharged from an emitter is comprised. Therefore, in order to put the emitter into an operating state, a plurality of steps are required, such as a step of rotating the flap around the hinge, and a step of engaging the rotated flap with the main body by chemical bonding or heat welding. Become. As described above, since the plurality of steps increases the manufacturing cost of the emitter, it is desired to suppress the manufacturing cost. In particular, since the process of engaging the flap with the main body by bonding or welding significantly increases the manufacturing cost, an emitter that does not require bonding or welding in the manufacturing process is desired.

An object of the present invention is to provide an emitter and a drip irrigation tube that can reduce manufacturing costs.

The emitter according to the present invention is bonded to a position on the inner wall surface of the tube through which the irrigation liquid is circulated, corresponding to the discharge port communicating with the inside and the outside of the tube, and quantifies the irrigation liquid in the tube from the discharge port. In particular, an emitter for discharging out of the tube, comprising an emitter body and a pedestal accommodated in the emitter body, the emitter body having a water intake for taking in the irrigation liquid; A decompression channel groove for communicating with the water intake unit to form a decompression channel for flowing the irrigation liquid while decompressing; a housing unit for communicating with the decompression channel groove for housing the pedestal; And a diaphragm portion that approaches the pedestal when receiving the pressure of the irrigation liquid in the tube in a state in which the pedestal is accommodated in the accommodating portion. The irrigation liquid which has flowed into the accommodating portion from the flow channel has a through hole for discharging toward the discharge port, said emitter body, said pedestal, are connected via a hinge portion.

A drip irrigation tube according to the present invention includes a tube having a discharge port for discharging a liquid for irrigation, and an emitter according to the present invention joined to a position corresponding to the discharge port on the inner wall surface of the tube. .

According to the present invention, an emitter and a drip irrigation tube that can reduce manufacturing costs can be provided.

FIG. 1 is a cross-sectional view of a drip irrigation tube according to an embodiment of the present invention. FIG. 2 is a perspective view of the emitter after the pedestal is accommodated in the accommodating portion as viewed from the front side (the surface on the side having the water intake portion). 3A and 3B are diagrams showing the configuration of the emitter after the pedestal is accommodated in the accommodating portion. 4A to 4C are diagrams showing the configuration of the emitter after the pedestal is accommodated in the accommodating portion. FIG. 5 is a perspective view of the emitter before the pedestal is accommodated in the accommodating portion as viewed from the front side. 6A and 6B are diagrams showing the configuration of the emitter before the pedestal is accommodated in the accommodating portion. 7A to 7C are diagrams showing the configuration of the emitter before the pedestal is accommodated in the accommodating portion.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[Composition of drip irrigation tube and emitter]
FIG. 1 is a cross-sectional view of a drip irrigation tube 100 according to an embodiment of the present invention.

As shown in FIG. 1, the drip irrigation tube 100 has a tube 110 and an emitter 120.

The tube 110 is a tube for flowing irrigation liquid. Examples of irrigation liquids include water, liquid fertilizers, pesticides and mixtures thereof. The direction in which the irrigation liquid flows in the tube 110 is not particularly limited. Further, the material of the tube 110 is not particularly limited. In the present embodiment, the material of the tube 110 is polyethylene.

The tube wall of the tube 110 is formed with a plurality of discharge ports 111 for discharging the irrigation liquid at predetermined intervals (for example, 200 mm or more and 500 mm or less) in the axial direction of the tube 110. The diameter of the opening of the discharge port 111 is not particularly limited as long as the irrigation liquid can be discharged. In the present embodiment, the diameter of the opening of the discharge port 111 is 1.5 mm. Emitters 120 are respectively joined to positions on the inner wall surface 112 corresponding to the discharge ports 111. The cross-sectional shape and cross-sectional area perpendicular to the axial direction of the tube 110 are not particularly limited as long as the emitter 120 can be disposed inside the tube 110 without leakage.

The drip irrigation tube 100 is manufactured by joining the surface (back surface 125) of the emitter 120 to be joined to the tube 110 to the inner wall surface 112. The method for joining the tube 110 and the emitter 120 is not particularly limited. Examples of the method for joining the tube 110 and the emitter 120 include welding of a resin material constituting the tube 110 or the emitter 120 and adhesion with an adhesive. The discharge port 111 may be formed after joining the tube 110 and the emitter 120, or may be formed before joining.

2, 3A, B, and 4A to 4C are diagrams showing the configuration of the emitter 120 according to the present embodiment after the pedestal 122 is accommodated in the accommodating portion 135. FIG. FIG. 2 is a perspective view of the emitter 120 as viewed from the front side (the surface on the side having the water intake portion 131). 3A is a plan view of the emitter, and FIG. 3B is a bottom view. 4A is a front view of the emitter 120, FIG. 4B is a cross-sectional view taken along line AA shown in FIG. 3A, and FIG. 4C is a left side view.

As shown in FIGS. 1, 2, 3A and B and FIGS. 4A to 4C, the emitter 120 is joined to the inner wall surface 112 of the tube 110 so as to cover the discharge port 111. The shape of the emitter 120 is not particularly limited as long as it can adhere to the inner wall surface 112 and cover the discharge port 111. In the present embodiment, the shape of the back surface joined to the inner wall surface 112 in the cross section of the emitter 120 perpendicular to the axial direction of the tube 110 is a substantially arc shape convex toward the inner wall surface 112 along the inner wall surface 112. It is. As shown in FIG. 3A, the shape of the emitter 120 in plan view is a substantially rectangular shape with four corners rounded. In the present embodiment, the length of the emitter 120 in the long side direction is 19 mm, the length in the short side direction is 8 mm, and the height is 2.7 mm. The size of the emitter 120 is not particularly limited, and may be appropriately determined based on a desired amount of irrigation liquid discharged from the discharge port 111.

In this embodiment, the emitter 120 is formed of a flexible material. Examples of the material of the emitter 120 include resin, elastomer, and rubber. Examples of the resin include polyethylene and silicone. The flexibility of the emitter 120 can be adjusted by using a resin material having elasticity. Examples of a method for adjusting the flexibility of the emitter 120 include selection of a resin having elasticity and adjustment of a mixing ratio of the resin material having elasticity to a hard resin material.

As shown in FIG. 1, FIG. 2, FIG. 3A, B, and FIGS. 4A to C, the emitter 120 has an emitter main body 121 and a base 122 accommodated in the emitter main body 121. The emitter body 121 and the pedestal 122 are connected via a hinge part 123. The pedestal 122 is accommodated in the accommodating portion 135 of the emitter main body 121 from the back surface 125 side facing the discharge port 111 before the emitter 120 is joined to the tube 110.

The emitter body 121 becomes a water intake part 131, a first connection groove 132 that becomes the first connection flow path 142, a pressure reduction groove (pressure reduction flow path groove) 133 that becomes the pressure reduction flow path 143, and a second connection flow path 144. And a second connection groove 134. By accommodating the pedestal 122 in the emitter main body 121, the flow rate adjusting unit 137 and the discharge unit 138 are formed. A water intake 131 is opened on the surface 124 of the emitter body 121. On the other hand, the first connection groove 132, the decompression groove 133, the second connection groove 134, and the accommodating portion 135 are opened on the back surface 125 of the emitter body 121.

By joining the emitter 120 to the tube 110, the first connection groove 132, the decompression groove 133, and the second connection groove 134 become the first connection flow path 142, the decompression flow path 143, and the second connection flow path 144, respectively. . As a result, the water intake part 131, the first connection flow path 142, the decompression flow path 143, the second connection flow path 144, the flow rate adjustment part 137, and the discharge part 138 are configured to connect the water intake part 131 and the discharge part 138. Is formed. This flow channel allows the irrigation liquid to flow from the water intake unit 131 to the discharge unit 138.

The water intake 131 is disposed in a region that is more than half of the surface 124 of the emitter body 121. In the present embodiment, two water intake portions 131 are disposed at both ends of the emitter 120 in the minor axis direction (FIG. 3A). A flow rate adjusting unit 137 is arranged in the region of the surface 124 where the water intake unit 131 is not arranged. The water intake portion 131 includes a water intake side screen portion 146 and a plurality of water intake through holes 147.

The intake side screen unit 146 prevents floating substances in the irrigation liquid introduced into the emitter 120 from entering the intake recess 148. The water intake side screen portion 146 is open to the inside of the tube 110 and has a water intake recess 148 and a ridge 149.

The depth of the water intake recess 148 is not particularly limited, and is appropriately set depending on the size of the emitter 120. On the bottom surface of the water intake recess 148, a protrusion 149 is formed. In addition, a water intake through hole 147 is formed in the bottom surface of the water intake recess 148.

The protrusion 149 is disposed on the bottom surface of the water intake recess 148. The arrangement and number of the ridges 149 are not particularly limited as long as the irrigation liquid can be taken in from the opening side of the water intake recess 148 and the intrusion of suspended matter in the irrigation liquid can be prevented. In the present embodiment, the ridges 149 are arranged along the minor axis direction of the emitter 120 and are arranged in the major axis direction of the emitter 120. Moreover, the distance between the adjacent protruding item | lines 149 will not be specifically limited if the above-mentioned function can be exhibited. The ridges 149 may be formed so that the width decreases from the surface 124 of the emitter 120 toward the bottom surface of the water intake recess 148, or the same from the surface 124 of the emitter 120 to the bottom surface of the water intake recess 148. You may form in width.

The water intake through hole 147 is formed on the bottom surface of the water intake recess 148. The shape and number of the water intake through-holes 147 are not particularly limited as long as the irrigation liquid taken into the water intake recess 148 can be taken into the emitter body 121. In the present embodiment, the water intake through hole 147 is a single long hole formed along the long axis direction of the bottom surface of the water intake recess 148. Since each long hole is covered with a plurality of ridges 149, when viewed from the front side, one water intake through hole 147 seems to be divided into a large number of through holes.

The irrigation liquid that has flowed through the tube 110 is taken into the emitter 120 while floating substances are prevented from entering the water intake recess 148 by the water intake side screen part 146.

The first connection groove 132 (first connection flow path 142) connects the water intake through hole 147 (water intake portion 131) and the decompression groove 133. The first connection groove 132 is formed in a substantially U shape along the outer edge portion of the back surface 125 of the emitter 120. A decompression groove 133 is connected near the center of the first connection groove 132. By joining the tube 110 and the emitter 120, the first connection channel 142 is formed by the first connection groove 132 and the inner wall surface 112 of the tube 110. The irrigation liquid taken in from the water intake unit 131 flows through the first connection channel 142 to the decompression channel 143.

The decompression groove 133 (decompression channel 143) connects the first connection groove 132 (first connection channel 142) and the second connection channel 144. The decompression groove 133 (decompression channel 143) reduces the pressure of the irrigation liquid introduced from the water intake unit 131 and guides the irrigation liquid to the flow rate adjustment unit 137. The decompression groove 133 is disposed in the center portion of the back surface 125 along the long axis direction. The upstream end of the decompression groove 133 is connected to the first connection groove 132, and the second connection groove 134 communicating with the flow rate adjusting unit 137 is connected to the downstream end. The shape of the decompression groove 133 is not particularly limited as long as the above function can be exhibited. In the present embodiment, the planar view shape of the decompression groove 133 is a zigzag shape. In the decompression grooves 133, substantially triangular prism-shaped convex portions 139 projecting from the inner surface are alternately arranged along the direction in which the irrigation liquid flows. The convex portion 139 is arranged so that the tip does not exceed the central axis of the decompression groove 133 when viewed in plan. By joining the tube 110 and the emitter 120, the decompression channel 143 is formed by the decompression groove 133 and the inner wall surface of the tube 110. The irrigation liquid taken in from the water intake unit 131 is decompressed by the decompression flow path 143 and guided to the flow rate adjustment unit 137.

The second connection groove 134 (second connection flow path 144) connects the pressure reduction groove 133 (pressure reduction flow path 143) and the flow rate adjusting unit 137. The second connection groove 134 is a groove formed linearly along the major axis direction of the emitter 120 on the back surface 125 side of the emitter 120. The upstream end of the second connection groove 134 is connected to the decompression groove 133, and the downstream end of the second connection groove 134 is connected to the flow rate adjustment unit 137 (accommodating unit 135). By joining the tube 110 and the emitter 120, the second connection flow path 144 is formed by the second connection groove 134 and the inner wall surface 112 of the tube 110. The irrigation liquid decompressed by the decompression flow path 143 flows to the flow rate adjustment unit 137 through the second connection flow path 144.

5 to 7 are diagrams showing the configuration of the emitter 120 before the pedestal is accommodated in the accommodating portion. FIG. 5 is a perspective view of the emitter 120 before the pedestal is accommodated in the accommodating portion as viewed from the front side. 6A is a plan view of the emitter before the pedestal is accommodated in the accommodating portion, and FIG. 6B is a bottom view. 7A is a front view of the emitter 120 before the pedestal is accommodated in the accommodating portion, FIG. 7B is a cross-sectional view taken along line AA shown in FIG. 6A, and FIG. 7C is a right side view.

The flow rate adjusting unit 137 adjusts the flow rate of the irrigation liquid that has flowed. The flow rate adjusting unit 137 is disposed in a region where the water intake unit 131 of the emitter 120 is not disposed. As shown in FIGS. 5, 6A, B, and FIGS. 7A to 7C, the flow rate adjustment unit 137 includes a storage unit 135, a pedestal 122, a communication hole 151, and a diaphragm unit 152.

The accommodating part 135 is a substantially cylindrical recessed part. When the emitter 120 is joined to the tube 110, the housing part 135 opens on the surface of the emitter main body 121 on the side to be joined to the tube 110. A protrusion 154 for fixing the pedestal 122 is disposed on the inner peripheral surface 153 of the accommodating portion 135. The number of the protrusions 154 is not particularly limited as long as the above function can be exhibited. In the present embodiment, the number of protrusions 154 is six. Further, the shape of the protrusion 154 is not particularly limited as long as the above function can be exhibited. In the present embodiment, the shape of the protrusion 154 is a substantially trapezoidal columnar shape. A pedestal 122 (see FIG. 1) is arranged in the accommodating portion 135 in order to adjust the amount of irrigation liquid flowing from the second connection flow path 144 from the discharge port 111 of the tube 110. After the pedestal 122 is disposed in the accommodating portion 135 and fixed by the protrusion 154, the emitter 120 is joined to the inner wall surface 112 of the tube 110.

The pedestal 122 is an annular member. The pedestal 122 is open to the back surface 125 of the emitter body 121, and a communication hole 151 that communicates with a discharge portion 138 (see FIG. 1) that faces the discharge port 111 of the tube 110 when the emitter 120 is joined to the tube 110. And a communication groove 155 that connects the outer peripheral side of the base 122 and the communication hole 151.

As shown in FIG. 1, when the emitter 120 is joined to the inner wall surface 112 of the tube 110, the pedestal 122 disposed in the accommodating portion 135 and the diaphragm portion 152 facing the upper surface of the pedestal 122, A flow rate adjusting unit 137 for adjusting the flow rate of the irrigation liquid discharged from the communication hole 151 of the emitter 120 (the pedestal 122) according to the pressure of the irrigation liquid is configured. In the present embodiment, the planar view shape of the diaphragm portion 152 is a circular shape. In the present embodiment, the diaphragm portion 152 is formed integrally with other components of the emitter main body 121 (the water intake portion 131, the first and second connection flow paths 142, 144, the decompression flow path 143, etc.). The emitter 120 including the diaphragm portion 152 is manufactured by, for example, injection molding.

The diaphragm portion 152 is formed integrally with the other configuration of the emitter 120, and thus has flexibility. Diaphragm portion 152 is in a state where emitter 120 is joined to inner wall surface 112 of tube 110, and the upper surface side of pedestal 122 (the surface on the side facing pedestal portion 152 of pedestal 122) due to the pressure of irrigation liquid in tube 110. Deforms toward.

Hinge portion 123 connects emitter body 121 and pedestal 122. The shape and size of the hinge part 123 can be appropriately set within a range in which the above-described functions can be exhibited. In the present embodiment, the hinge portion 123 is connected to a side surface 126 that is continuous with the back surface 125. The hinge portion 123 may be disposed on the side surface of the emitter body 121 in the major axis direction (in the direction in which the irrigation liquid flows), or may be disposed on the side surface 126 of the emitter body 121 in the minor axis direction. The hinge 123 is preferably connected to the upstream or downstream side 126 in the direction in which the irrigation liquid flows, from the viewpoint of not hindering the flow of the irrigation liquid.

The hinge portion 123 is bent when the pedestal 122 is accommodated in the accommodating portion 135 and is not separated from the emitter main body 121 and the pedestal 122. Further, as described above, the back surface 125 of the emitter 120 is joined to the inner wall surface 112 of the tube 110. Therefore, in the present embodiment, the back surface of the emitter 120 is appropriately joined to the inner wall surface 112 of the tube 110, so that the back surface 125 of the emitter body 121 has a groove for accommodating the hinge portion 123. 156 is formed.

The groove 156 accommodates the hinge portion 123 when the emitter 120 is joined to the tube 110. The shape of the groove 156 is not particularly limited as long as the hinge portion 123 can be accommodated. In the present embodiment, the width of the groove 156 is slightly smaller than the width of the hinge portion 123. When joining the emitter 120 to the tube 110, the pedestal 122 is accommodated in the accommodating portion 135 and the hinge portion 123 is accommodated in the groove 156. At this time, since the width of the groove 156 is slightly smaller than the width of the hinge portion 123, the hinge portion 123 is accommodated while being press-fitted into the groove 156.

Here, the operation of the diaphragm unit 152 according to the pressure of the irrigation liquid in the tube 110 will be described.

Before the irrigation liquid is fed into the tube 110, the diaphragm portion 152 is not deformed because the pressure of the irrigation liquid is not applied to the diaphragm portion 152 (see FIG. 1).

When the irrigation liquid starts to be fed into the tube 110, the pressure of the irrigation liquid in the tube 110 starts to increase, and the diaphragm portion 152 starts to deform. When the pressure of the irrigation liquid is relatively low, the deformation of the diaphragm portion 152 is relatively small, and the diaphragm portion 152 does not contact the upper surface of the pedestal 122. In this state, since the communication hole 151 of the pedestal 122 is not blocked, the irrigation liquid that has flowed from the second connection flow path 144 into the space between the diaphragm portion 152 and the upper surface of the pedestal 122 is discharged from the communication hole 151 to the discharge portion 138. Is discharged.

When the pressure of the irrigation liquid exceeds the set value, the amount of deformation of the diaphragm portion 152 further increases, and the diaphragm portion 152 comes into close contact with the upper surface of the pedestal 122. However, even if the diaphragm portion 152 is in close contact with the upper surface of the pedestal 122, the communication groove 155 of the pedestal 122 is not blocked. Therefore, the irrigation liquid flowing from the second connection flow path 144 flows through the communication groove 155 and is discharged from the communication hole 151. Therefore, even when the diaphragm portion 152 is in close contact with the upper surface of the pedestal 122, a certain amount or more of irrigation liquid is discharged to the discharge portion 138.

With such a configuration, it is possible to secure a certain amount or more of the irrigation liquid discharged from the communication hole 151 regardless of the pressure of the irrigation liquid in the tube 110. That is, the drip irrigation tube 100 according to the present embodiment can discharge a certain amount or more of the irrigation liquid out of the tube 110 regardless of whether the pressure of the irrigation liquid is low or high.

Note that the width of the communication groove 155 is not particularly limited. The width of the communication groove 155 may be determined based on, for example, the amount of irrigation liquid that is desirably discharged from the communication hole 151 when the pressure of the irrigation liquid exceeds a set value.

(effect)
As described above, the emitter 120 according to the present embodiment includes the water intake portion 131 that communicates with the inside of the tube 110 when the emitter 120 is joined to the tube 110, and the decompression channel (decompression pressure) that flows while reducing the pressure of the irrigation liquid A flow path 143) for forming the flow path 143) and a flow rate adjusting section (pedestal 122, diaphragm) for adjusting the flow rate of the irrigation liquid according to the pressure of the irrigation liquid in the tube 110 Part 152) and a discharge part 138 that faces the discharge port 111 when the emitter 120 is joined to the tube 110. The flow rate adjusting unit is disposed apart from the base 122, the storage unit 135 that stores the base 122, the communication hole 151 that opens to the base 122 and communicates with the discharge unit 138, and has flexibility. And a diaphragm portion (diaphragm portion 152) that approaches the pedestal 122 when the pressure of the irrigation liquid in the tube 110 is received. The diaphragm portion is connected to the emitter body through a hinge portion.

With such a configuration, the emitter 120 according to the present embodiment is formed, for example, by integrally forming a flap movable with respect to the conventional emitter body with the emitter body, rotating the flap around the hinge, and then turning the flap into the emitter. Compared with the case where the diaphragm portion is formed by engaging the main body by adhesion or welding, it can be manufactured at a reduced cost. Specifically, since the step of engaging the flap with the emitter body by bonding or welding can be omitted, the manufacturing cost can be reduced accordingly.

Further, in the present embodiment, the emitter 120 is placed in the tube 110 through a simple process of arranging the pedestal 122 in the accommodating portion 135 without bonding the pedestal 122 to the emitter body (accommodating portion 135) by adhesion or welding. Since it can be joined to the wall surface 112, the manufacturing cost can be reduced compared to the case where the pedestal 122 is joined to the emitter body (accommodating portion 135) by adhesion or welding. Furthermore, since the emitter 120 has a hinge portion, the welding between the emitter 120 and the inner wall surface 112 of the tube 110 becomes stronger in the step of joining the emitter 120 to the inner wall surface 112 of the tube 110.

In other words, in the present embodiment, the emitter 120 is placed in the tube 110 through a simple process of arranging the pedestal 122 in the accommodating portion 135 without bonding the pedestal 122 to the emitter body (accommodating portion 135) by adhesion or welding. Since it can be joined to the wall surface 112, the manufacturing cost can be reduced as compared with the case where the pedestal 122 is joined to the emitter body (accommodating portion 135) by adhesion or welding to secure the clearance.

This application claims priority based on Japanese Patent Application No. 2018-101332 filed on May 28, 2018. The contents described in the application specification and the drawings are all incorporated herein.

According to the present invention, an emitter capable of adjusting the flow rate of the flowing liquid can be provided at a reduced manufacturing cost. Accordingly, it is expected that the emitter will be spread to technical fields that require long-term dripping, such as drip irrigation and durability tests, and further development of the technical field will be expected.

DESCRIPTION OF SYMBOLS 100 Drip irrigation tube 110 Tube 111 Discharge port 112 Inner wall surface 120 Emitter 121 Emitter main body 122 Base 123 Hinge part 131 Water intake part 132 1st connection groove 133 Decompression groove 134 2nd connection groove 135 Storage part 137 Flow volume adjustment part 138 Discharge part 139 Convex part 142 First connection flow path 143 Decompression flow path 144 Second connection flow path 146 Water intake side screen part 147 Water intake through hole 148 Water intake concave part 149 Protrusion 151 Communication hole 152 Diaphragm part 153 Inner peripheral surface 154 Projection 155 Connection groove

Claims (5)

The irrigation liquid in the tube is quantitatively discharged out of the tube from the discharge port by being joined to a position corresponding to the discharge port communicating with the inside and outside of the tube on the inner wall surface of the tube through which the irrigation liquid flows. An emitter for
An emitter body and a pedestal accommodated in the emitter body;
The emitter body is
A water intake for taking in the irrigation liquid;
A reduced-pressure channel groove for forming a reduced-pressure channel that communicates with the intake portion and flows while reducing the pressure of the irrigation liquid;
An accommodating portion for communicating with the decompression channel groove and accommodating the pedestal;
A diaphragm portion that has flexibility, and in the state where the pedestal is accommodated in the accommodating portion, the diaphragm portion that approaches the pedestal when subjected to pressure of irrigation liquid in the tube;
The pedestal has a through hole for discharging the irrigation liquid that has flowed into the housing portion from the decompression channel groove toward the discharge port,
The emitter body and the pedestal are connected via a hinge part,
Emitter. When the emitter is joined to the tube, the accommodating portion opens on the surface of the emitter body on the side to be joined with the tube,
The hinge portion is connected to a side surface of the emitter main body that is continuous with a surface to be joined to the tube,
A groove for press-fitting the hinge portion is formed on the surface to which the tube is joined, connecting the inner peripheral surface of the housing portion and the side surface to which the hinge portion is connected,
The emitter according to claim 1. The hinge portion is connected to a side surface of the emitter body, which is located upstream or downstream in a direction in which the irrigation liquid flows in the tube when the emitter is joined to the tube. Item 3. The emitter according to Item 2. The emitter according to any one of claims 1 to 3, wherein the emitter main body, the pedestal, and the hinge portion are integrally formed. A tube having a discharge port for discharging irrigation liquid;
The emitter according to any one of claims 1 to 4, joined at a position corresponding to the discharge port of the inner wall surface of the tube.
Tube for drip irrigation.

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